I'm in need of some assistence and I'm not sure where to turn. I have a Sony DRU-720A drive that is having an odd problem. It appears to have stopped recognizing all DVD media, regular DVD movies, ROMS, blanks, etc. It still reads CD's and CD blanks just fine however. Keep in mind, I have successfully burned DVD-R discs and read DVD-ROMS just fine on the drive in the past. I'm wondering if it's a software problem of some sort. Can anyone help? Thanks.